Organic light emitting display apparatus encapsulated with hydrophobic organic film and manufacturing method thereof

ABSTRACT

An organic light emitting display apparatus is disclosed. The display apparatus includes a substrate, an organic light emitting unit on the substrate, and a film encapsulation layer on the organic light emitting unit. The film encapsulation layer includes a hydrophobic organic layer disposed at an outermost portion of the film encapsulation layer.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application claims the benefit of priority to Chinese PatentApplication No, 201310697551.3, filed with the Chinese Patent Office onDec. 18, 2013 and entitled “ORGANIC LIGHT EMITTING DISPLAY APPARATUSENCAPSULATED WITH HYDROPHOBIC ORGANIC FILM AND MANUFACTURING METHODTHEREOF”, the content of which is incorporated herein by reference inits entirety.

TECHNICAL FIELD

The present disclosure relates to the technical field of organic lightemitting display, and particularly to an organic light emitting displayapparatus encapsulated with a hydrophobic organic film, a manufacturingmethod thereof, and a hydrophobic organic composite material.

BACKGROUND OF THE INVENTION

Since an organic light emitting display generally known as an OLEDdisplay is self-luminescent, the OLED display has a lower powerconsumption, a higher brightness and a higher response speed as comparedwith the conventional liquid crystal display. Thus, the OLED display isstudied as a main research object in the field of the display.

The OLED display includes an organic light emitting layer having a lightemitting function, which is very sensitive to external environmentalfactors such as moisture and oxygen. Thus, if an OLED display stand isexposed to the environment with the moisture or oxygen, the performancesof the devices in the OLED display may be significantly deteriorated orbe completely damaged. In order to improve a service life of the OLEDand a stability of the device, a sealing process must be adopted toencapsulate the device. For example, in an existing organic lightemitting diode (OLED) display, an encapsulation structure with multipleblocking layers is configured to isolate the display from moisture andoxygen. However, in the conventional technology, the blocking layer isgenerally made from an inorganic material, which results in someproblems. For example, since each of the film layers is made from aninorganic material, the deposited film has a large internal stress, andthe produce has a low reliability. The produce, generated by depositingthe inorganic materials, has unavoidable defects such as micro cracksand impurity doping, which may result in an adverse effect for theencapsulation.

BRIEF SUMMARY OF THE INVENTION

One inventive aspect is an organic light emitting display apparatus. Thedisplay apparatus includes a substrate, an organic light emitting uniton the substrate, and a film encapsulation layer on the organic lightemitting unit. The film encapsulation layer includes a hydrophobicorganic layer disposed at an outermost portion of the film encapsulationlayer.

Another inventive aspect is a method for manufacturing an organic lightemitting display apparatus. The method includes providing a substrate,forming an organic light emitting unit on the substrate, and forming afilm encapsulation layer covering the organic light emitting unit.Forming the film encapsulation layer includes forming at least ahydrophobic organic layer covering the organic light emitting unit witha plasma enhanced chemical vapor deposition method. In addition, thefilm encapsulation layer includes the hydrophobic organic layer, and thehydrophobic organic layer is disposed at an outermost portion of thefilm encapsulation layer.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the technical solutions according tothe embodiments of the present disclosure, the accompanying drawingsused in the description of the embodiments will be briefly describedbelow. It is obvious that the accompanying drawings in the followingdescription are only some embodiments of the present disclosure. Forthose skilled in the art, other accompanying drawings may be obtainedaccording to these accompanying drawings without any creative work.

FIG. 1 is a schematic diagram of an organic light emitting displayapparatus according to a first embodiment;

FIG. 2 is a schematic diagram of an organic light emitting displayapparatus according to a second embodiment;

FIG. 3 is a schematic diagram of another organic light emitting displayapparatus according to the second embodiment;

FIG. 4 is a schematic diagram of yet another organic light emittingdisplay apparatus according to the second embodiment;

FIG. 5 is a schematic diagram of an organic light emitting displayapparatus according to a third embodiment;

FIG. 6 is a schematic diagram of a method for manufacturing an organiclight emitting display apparatus according to a fourth embodiment;

FIG. 7 a to FIG. 7 d are flowcharts of a method for manufacturing anorganic light emitting display apparatus according to the fourthembodiment; and

FIG. 8 is a principle diagram of forming a liquid droplet on a solidsurface by gas.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The technical solutions according to the embodiment of the presentdisclosure will be described clearly and thoroughly below in conjunctionwith the accompanying drawings. It is obvious that the embodimentsdescribed are only a part of and not all of the embodiments according tothe present disclosure. All the other embodiments obtained by thoseskilled in the art based on the embodiments in the present disclosurewithout any creative work belong to the protection scope of the presentdisclosure.

In order to more clearly illustrate the present disclosure, thecomponents not mentioned in the description is omitted in theaccompanying drawings, and the same reference indicates similar elementsthroughout the whole description.

In addition, sizes and thicknesses of the structural assemblies areshown randomly for convenience of illustrating, the present disclosureis not limited thereto.

In the accompanying drawings, the thicknesses of a layer, a film, apanel, and a region are enlarged for clarity. It should be understoodthat when an element such as a layer, a film, a region or substrate isreferred to as being “on” the other element, it can be directly on theother element or an intervening element may also be presented. Incontrast, when an element is referred to as “directly on” the otherelement, there is no an intervening element.

An organic light emitting display apparatus encapsulated with ahydrophobic organic film, a manufacturing method thereof, and ahydrophobic organic composite material are provided according to thedisclosure. The organic light emitting display apparatus includes: asubstrate, an organic light emitting unit formed on the substrate; and afilm encapsulation layer formed on the organic light emitting unit,wherein the film encapsulation layer includes at least a hydrophobicorganic layer disposed at an outermost structure of the filmencapsulation layer. Thus, when the moisture enters the OLED, thehydrophobic organic layer, as a first line of defense, may blockmoisture effectively, by which the OLED is prevented from immersing.Furthermore, the hydrophobic organic layer may eliminate the stressgenerated by an inorganic blocking layer to minimize the stress of theoverall film encapsulation layer.

In the present disclosure, the plasma is polymerized to form ahydrophobic organic layer in plasma enhanced chemical vapor deposition(PECVD) method by using fluorinated silane and silane as a precursor.The hydrophobic organic layer may include different components due todifferent process conditions. Therefore, the nature of the hydrophobicorganic layer may be easily adjusted as required. In addition, thehydrophobic organic layer includes chemical bonds of C—F, Si—C, Si—O—Si,C—H, and the like.

As shown in FIG. 1, an organic light emitting display apparatus 10encapsulated with a hydrophobic organic film is provided according to afirst embodiment of the present disclosure, which includes: a substrate1, an organic light emitting unit 2; and a film encapsulation layer. Thefilm encapsulation layer includes at least a hydrophobic organic layer3.

The organic light emitting unit 2 is formed on the substrate 1; and thefilm encapsulation layer is formed on the organic light emitting unit 2.The film encapsulation layer includes at least the hydrophobic organiclayer 3 disposed at the outermost structure of the film encapsulationlayer.

A contact angle between the hydrophobic organic layer 3 and the moistureis 90° to 170°, and more preferably is 110° to 160°.

FIG. 8 is a principle diagram of forming a liquiddroplet on a solidsurface by gas, in which the following equation is satisfied.γ_(sg)=γ_(sl)+γ_(lg) cos θ_(c)

where θ_(c) is an angle where an interface of liquid and vapor meets asolid surface, which is generally known as a contact angle;

r_(sg) is a solid-vapor interfacial energy; r_(sl) is a solid-liquidinterfacial energy; and r_(lg) is a liquid-vapor interfacial energy.

When the contact angle θ_(c) of the moisture (e.g. water) and a surfaceof a certain material is greater than 90°, the surface of the materialwould not be wetted by the moisture, i.e., this material is ahydrophobic material. Therefore, in order to prevent the organic lightemitting unit 2 from being wetted by moisture and the like, at least thehydrophobic organic layer 3 may be disposed at the outermost of the filmencapsulation layer. Since the contact angle between the hydrophobicorganic layer 3 and the moisture is 90° to 170°, which is greater than90°, the hydrophobic organic layer has a good impermeability. Therefore,the hydrophobic organic layer 3 may prevent moisture from penetratingrapidly into the organic light emitting display device 10, a lag time ofmoisture penetrating is increased and thus the service life of thedevices such as the organic light emitting element 2 is lengthened.

The hydrophobic organic layer 3 may be a fluorinated hybrid polymerorganic film having a good hydrophobicity, which is manufactured inplasma enhanced chemical vapor deposition method by using fluorinatedsilane and silane with hydrophobicity as a precursor. Preferably, thefluorinated hybrid polymer organic film is manufactured by selectingheptadecafluorodecyl trimethoxysilane (FAS-17) and tetramethoxysilane(TMS) as a precursor. The manufactured fluorinated hybrid polymerorganic film includes, in atomic percent, 10 at % to 50 at % of fluorineatom F, 1 at % to 30 at % of silicon atom Si, 1 at % to 30 at % ofoxygen atom 0, and 15 at % to 50 at % of carbon atom C.

In addition, the fluorinated hybrid polymer organic film containschemical bonds of C—F, Si—C, Si—O—Si, C—H, and the like, which makes ithaving a good hydrophobicity.

As shown in FIG. 2, an organic light emitting display apparatus 10encapsulated with a hydrophobic organic film is provided according to asecond embodiment of the present disclosure. The second embodimentdiffers from the first embodiment in that the film encapsulation layerfurther includes an inorganic blocking layer 4. Other structures in thesecond embodiment are basically the same as that disclosed according tothe first embodiment, which will not be described herein.

Specifically, the film encapsulation layer further includes an inorganicblocking layer 4 located between the organic light emitting unit 2 andthe hydrophobic organic layer 3. The hydrophobic organic layer 3 isdisposed at the outermost structure of the film encapsulation layer,

The inorganic blocking layer 4 is formed in atomic layer deposition(ALD) method, plasma enhanced chemical vapor deposition (PECVD) methodor physical vapor deposition (PVD) method. Generally, the inorganicblocking layer 4 is optionally made from one or more of a metal oxide, ametal nitride, a silicon oxide or a silicon nitride, such as, Al₂O₃,TiO₂, ZrO, SiO₂, MON, AlN, SiON, ZnO, ZnS, MgO or MgS.

The hydrophobic organic layer 3 has a thickness in a range of 500 nm to3000 nm. The inorganic blocking layer 4 has a thickness in a range of300 nm to 1000 nm. The thickness of the hydrophobic organic layer 3 islarger than the thickness of the inorganic blocking layer 4, and thusthe hydrophobic organic layer 3 may eliminate the stress generated by aninorganic blocking layer 4. The stress is a disadvantage to the organiclight emitting unit. In general, the thicker the thickness of thehydrophobic organic layer 3 and the inorganic blocking layer 4 is, thebetter the impermeability is. However, in practice, it is necessary toconsider an effect of a thickness of the whole film encapsulation layeron the lighting and thinning of the organic light emitting displaydevice and other process factors. Thus, above thickness range isgenerally selected.

In the film encapsulation layer according to the embodiment, thehydrophobic organic layer 3 is disposed at the outermost structure ofthe film encapsulation layer, and the inorganic blocking layer 4 islocated between the organic light emitting unit 2 and the hydrophobicorganic layer 3. Due to the presence of the inorganic blocking layer 4,as compared with the case that only the single hydrophobic organic layer3 is used in the film encapsulation layer, a curved path along which themoisture immerges is provided, and thus the lag time is furtherincreased and the impermeability is improved. In this case, the moisturepermeability of the film encapsulation layer is smaller than 10⁻⁶g/m²/day. In addition, the hydrophobic organic layer 3 may furthereliminate the residual rigid stress, which is caused by the inorganicblocking layer 4 in a certain extent and result in an adverse effect onthe organic light emitting unit 2.

Of course, a specific structure of the film encapsulation layer may alsobe further optimized. Specifically, the film encapsulation layer isformed by periodically and alternately overlapping the hydrophobicorganic layer 3 and the inorganic blocking layer 4, and disposing thehydrophobic organic layer 3 at the outermost structure of the filmencapsulation layer. The number of layers, each of which includes onehydrophobic organic layer 3 and one inorganic blocking layer 4 which areoverlapped, is N, where 1≦N≦10, and N is a positive integer, morepreferably, 1≦N≦5, and N is a positive integer. The film encapsulationlayer has a thickness in a range of 0.5 μm to 10 μm. The thickness ofthe film encapsulation layer may depend on the number of layers, each ofwhich includes one hydrophobic organic layer 3 and one inorganicblocking layer 4 which are overlapped. However, the above thickness ofthe film encapsulation layer is preferable in the term of the wholestructure of an organic light emitting device.

As shown in FIG. 3 and FIG. 4, a film encapsulation layer of an organiclight emitting display apparatus 10 shown in FIG. 3 differs from that ofabove described organic light emitting display apparatus shown in FIG. 2in that: the hydrophobic organic layer 3 and the inorganic blockinglayer 4 are periodically and alternately overlapped two times, and thehydrophobic organic layer 3 is disposed at the outermost structure ofthe film encapsulation layer.

A film encapsulation layer of an organic light emitting displayapparatus 10 shown in FIG. 4 differs from that of above describedorganic light emitting display apparatus shown in FIG. 2 in that: thehydrophobic organic layer 3 and the inorganic blocking layer 4 areperiodically and alternately overlapped three times, and the hydrophobicorganic layer 3 is disposed at the outermost structure of the filmencapsulation layer.

The film encapsulation layer may be formed by periodically andalternately overlapping the hydrophobic organic layer 3 and theinorganic blocking layer 4. Thus, the curved path along which themoisture immerges is increased, the lag time is further increased, andthus the impermeability of the whole film encapsulation layer isimproved. In addition, as shown in FIG. 3 and FIG. 4, the inorganicblocking layer 4 is generally sandwiched between two hydrophobic organiclayers 3, and the thickness of the inorganic blocking layer 4 is smallerthan the thickness of the hydrophobic organic layer 3. Therefore thestress generated by depositing the inorganic blocking layer 4 may beeliminated.

The number of layers, each of which includes one hydrophobic organiclayer 3 and one inorganic blocking layer 4 which are alternatelyoverlapped, may be adjusted as required, which will not be describedherein and is not shown in the accompanying drawings. The presentdisclosure is not limited to the above embodiments.

As shown in FIG. 5, an organic light emitting display apparatus 10encapsulated with a hydrophobic organic film is provided according to athird embodiment of the present disclosure, which has a structuresimilar with the structure disclosed according to the first embodiment,which will not be described herein.

Specifically, the third embodiment differs from the second embodiment inthat: the film encapsulation layer includes multiple hydrophobic organiclayers 3. One of the hydrophobic organic layers 3 may be disposed at theoutermost structure of the film encapsulation layer. Another hydrophobicorganic layer 3 may be disposed at the innermost structure of the filmencapsulation layer, i.e., the organic light emitting unit 2 may bedirectly covered by the hydrophobic organic layer 3, as shown in FIG. 5.

The film encapsulation layer may be formed by periodically andalternately overlapping the hydrophobic organic layers 3 and theinorganic blocking layer 4. One of hydrophobic organic layers 3 may bedisposed at the outermost structure of the film encapsulation layer, andanother hydrophobic organic layer 3 may be disposed at the innermoststructure of the film encapsulation layer. The number of layers, each ofwhich includes one hydrophobic organic layer 3 and one inorganicblocking layer 4 which are alternately overlapped, is N, where 1≦N≦10,and N is a positive integer; more preferably 1≦N≦5, and N is a positiveinteger. The film encapsulation layer has a thickness in a range of 0.5μm to 10 μm.

The number of layers, each of which includes one hydrophobic organiclayer 3 and one inorganic blocking layer 4 which are alternatelyoverlapped, may be adjusted as required, which will not be describedherein and is not shown in the accompanying drawings. The presentdisclosure is not limited to the above embodiments.

As shown in FIG. 6 and FIGS. 7 a to 7 d, based on the first, second andthird embodiments, a fourth embodiment of the present disclosurediscloses a method for manufacturing an organic light emitting displayapparatus. The method includes the following Step S1 to Step S3.

In Step S1, a substrate 1 is provided and an organic light emitting unit2 is formed on the substrate 1, as shown in FIG. 7 a.

In Step S2, a film encapsulation layer is formed to cover the organiclight emitting unit 2. Specifically, Step S2 includes: forming at leasta hydrophobic organic layer 3 for covering the organic light emittingunit 2 in plasma enhanced chemical vapor deposition method. The filmencapsulation layer includes at least the hydrophobic organic layer 3disposed at an outermost structure of the film encapsulation layer. Acontact angle between the hydrophobic organic layer and moisture is 90°to 170°, and more preferably is 110° to 160°.

Step S2 includes Step S21 and Step S22.

Specifically, Step S21 includes: forming an inorganic blocking layer 4to cover the organic light emitting unit 2 in atomic layer deposition(ALD) method, plasma enhanced chemical vapor deposition (PECVD) methodor physical vapor deposition (CVD) method. The inorganic blocking layer4 is made from one or more of a metal oxide, a metal nitride, a siliconoxide or a silicon nitride, such as, Al₂O₃, TiO₂, ZrO, SiO₂, AlON, AlN,SiON, ZnO, ZnS, MgO or MgS. The inorganic blocking layer 4 has athickness in a range of 300 nm to 1000 nm, as shown in FIG. 7 b. It ispreferable to form the inorganic blocking layer 4 in plasma enhancedchemical vapor deposition (PECVD)method, because the hydrophobic organiclayer 3 in the next step S22 is also formed in PECVD. In this way, thesame process is employed in two steps, and the process is simple.

Specially, Step S22 includes: forming the hydrophobic organic layer 3 tocover the inorganic blocking layer 4 in plasma enhanced chemical vapordeposition method by using fluorinated silane and silane as a precursor,preferably, using heptadecafluorodecyl trimethoxysilane andtetramethoxysilane as a precursor, as shown in FIG. 7 c. The hydrophobicorganic layer 3 has a thickness in a range of 500 nm to 3000 nm. Thethickness of the hydrophobic organic layer 3 is larger than thethickness of the inorganic blocking layer 4, and thus the stressgenerated by the inorganic blocking layer 4 can be eliminated.

Furthermore, the method for manufacturing the organic light emittingdisplay apparatus further includes:

Step S3, repeating the Step S2 by M times to form the film encapsulationlayer by periodically and alternately overlapping the hydrophobicorganic layer 3 and the inorganic blocking layer 4, where 0≦M≦10, and Mis a positive integer. In FIG. 7 d, only M=1, that is, Step S2 isrepeatedly performed for one time, as shown in FIG. 7 d. However, thepresent disclosure is not limited thereto. The repeating times maydepend on the actual product and process conditions.

In Step S2, the film encapsulation layer for covering the organic lightemitting unit 2 is formed. The film encapsulation layer includesmultiple hydrophobic organic layers 3. One of the hydrophobic organiclayers 3 may be disposed at the innermost structure of the filmencapsulation layer, i.e., the hydrophobic organic layer 3 directlycovers the organic light emitting unit 2. In addition, anotherhydrophobic organic layer 3 may be disposed at the outermost structureof the film encapsulation layer. The forming sequence of the filmencapsulation layer may be adjusted suitably, which is not limited tothe method described above.

In addition, it should be noted that the hydrophobic organic layer 3 isa fluorinated hybrid polymer organic film, which is described in thefirst embodiment and will be omitted here.

Based on the first, second, third, and fourth embodiments, a fifthembodiment of the present disclosure discloses a hydrophobic organiccomposite material, which includes a fluorinated hybrid polymer organicfilm manufactured in plasma enhanced chemical vapor deposition method(PECVD) by using fluorinated silane and silane as a precursor, morepreferably, using heptadecafluorodecyl trimethoxysilane (FAS-17) andtetramethoxysilane (TMS) as a precursor. A contact angle between thehydrophobic organic layer and moisture is 90° to 170°, and morepreferably is 110° to 160°.

The fluorinated hybrid polymer organic film includes, in atomic percent,10 to 50 at % of fluorine atom F, 1 at % to 30 at % of silicon atom Si,1 at % to 30 at % of oxygen atom 0, and 15 at % to 50 at % of carbonatom C. The fluorinated hybrid polymer organic film contains chemicalbonds of C—F, Si—C, Si—O—Si, C—H, and the like, which makes it having agood hydrophobicity. A contact angle between the fluorinated hybridpolymer organic film and the moisture is 110° to 170°.

This embodiment discloses a method for manufacturing the abovehydrophobic organic composite material, which includes:

providing a substrate in the case that a pressure in a reaction chamberis lower than 100 Pa, more preferably 25 Pa to 50 Pa, where thesubstrate has a temperature lower than 100 Celsius degree, and morepreferably 50 Celsius degree to 70 Celsius degree;

using fluorinated silane and silane as a precursor, generally usingheptadecafluorodecyl trimethoxysilane (FAS-17) and tetramethoxysilane(TMS) as a precursor, and using an inert gas, generally Ar, as a carriergas, wherein a flow ratio of fluorinated silane to silane is 1:10-10:1,more preferably is 1:1; and

depositing fluorinated silane and silane on the substrate in plasmaenhanced chemical vapor deposition method to form the fluorinated hybridpolymer organic film.

The hydrophobicities of the fluorinated hybrid polymer organic filmsformed at different reaction conditions are shown in table 1, where thesubstrate has a temperature of 70 Celsius degree, the power of thecarrier gas Ar is 300 W, and a distance from an upper electrode to thesubstrate is 100 mm.

TABLE 1 contact Pressure of Reaction Flow ratio angle chamber/Pa(FAS-17/TMS) First embodiment 118° 25 1/1 Second embodiment 120° 30 1/1Third embodiment 143° 40 1/1 Fourth embodiment 160° 50 1/1 Comparativeexample 102° 50 Only FAS-17

Referring to table 1, a contact angle between the fluorinated hybridpolymer organic film and the moisture is greater than 110°, thus thefluorinated hybrid polymer organic film has a good hydrophobicity.

Through elemental analysis, the elements in the fluorinated hybridpolymer organic films manufactured at above different conditions areshown in atomic percentages/at % in detail in table 2. Atomic percentageof the elements in the fluorinated hybrid polymer organic filmmanufactured according to the fourth embodiment is shown in table 2,where the contact angle between the fluorinated hybrid polymer organicfilm and the moisture is 160°.

TABLE 2 Si/at % F/at % C/at % O/at % Fourth embodiment 15 40 35 10Comparative Example 10 42 29 19

In addition, the structure of the fluorinated hybrid polymer organicfilm manufactured is analyzed by an infrared (IR) spectroscopy, to seechemical bonds contained in the manufactured fluorinated hybrid polymerorganic film: Si—O—Si (a stretching vibration peak is at 1100 cm⁻¹, 810cm⁻¹ and 420 cm⁻¹), C-Fx (a stretching vibration peak is in a range of1120 cm⁻¹ to 1350 cm⁻¹), Si—CHx. (a stretching vibration peak is in avicinity of 1270 cm⁻¹).

The embodiments of the present invention are described herein in aprogressive manner, with the emphasis of each of the embodiments on thedifference between it and the other embodiments; hence, for the same orsimilar parts between the embodiments, one can refer to the otherembodiments.

The above description of the disclosed embodiments enables those skilledin the art to implement or utilize the present invention. It will beapparent for those skilled in the art to modify the embodiments invarious ways. The general principles defined herein can be implementedin other embodiments without departing from the spirit and the scope ofthe present invention. Therefore, the present invention is not limitedto these embodiments shown herein, but includes the broadest scopeconsistent with the principles and the novelty features disclosedherein.

What is claimed is:
 1. An organic light emitting display apparatus,comprising: a substrate, an organic light emitting unit on thesubstrate; and a film encapsulation layer on the organic light emittingunit, wherein the film encapsulation layer comprises a hydrophobicorganic layer disposed at an outermost portion of the film encapsulationlayer, wherein the hydrophobic organic layer is a fluorinated hybridpolymer organic film, and the fluorinated hybrid polymer organic filmcomprises, in atomic percent, 10 at % to 50 at % of fluorine atom F, 1at % to 30 at % of silicon atom Si, 1 at % to 30 at % of oxygen atom O,and 15 at % to 50 at % of carbon atom C.
 2. The organic light emittingdisplay apparatus according to claim 1, wherein a contact angle betweenthe hydrophobic organic layer and water ranges from 90° to 170°.
 3. Theorganic light emitting display apparatus according to claim 2, wherein acontact angle between the hydrophobic organic layer and water rangesfrom 110° to 160°.
 4. The organic light emitting display apparatusaccording to claim 1, wherein the film encapsulation layer furthercomprises at least an inorganic blocking layer disposed between theorganic light emitting unit and the hydrophobic organic layer.
 5. Theorganic light emitting display apparatus according to claim 4, whereinthe film encapsulation layer comprises alternately overlapping one ormore hydrophobic organic layers and one or more inorganic blockinglayers.
 6. The organic light emitting display apparatus according toclaim 5, wherein the film encapsulation layer comprises a plurality oflayers, wherein each layer includes one hydrophobic organic layer andone inorganic blocking layer which are overlapped, and wherein thenumber of the layers is N, where 1≦N≦10, and N is a positive integer. 7.The organic light emitting display apparatus according to claim 6,wherein the film encapsulation layer comprises a plurality of layers,wherein each layer includes one hydrophobic organic layer and oneinorganic blocking layer which are overlapped, and the number of thelayers is N, where 1≦N≦5, and N is a positive integer.
 8. The organiclight emitting display apparatus according to claim 1, wherein thehydrophobic organic layer has a thickness in a range of 500 nm to 3000nm.
 9. The organic light emitting display apparatus according to claim4, wherein the inorganic blocking layer has a thickness in a range of300 nm to 1000 nm.
 10. The organic light emitting display apparatusaccording to claim 4, wherein the film encapsulation layer has athickness in a range of 0.5 μm to 10 μm.
 11. The organic light emittingdisplay apparatus according to claim 1, wherein the hydrophobic organiclayer is made from a precursor comprising fluorinated silane and silane.12. The organic light emitting display apparatus according to claim 11,wherein the hydrophobic organic layer is made from a precursorcomprising heptadecafluorodecyl trimethoxysilane and tetramethoxysilane.13. The organic light emitting display apparatus according to claim 11,wherein the hydrophobic organic layer is formed with a plasma enhancedchemical vapor deposition method.
 14. The organic light emitting displayapparatus according to claim 4, wherein the inorganic blocking layercomprises one or more of a metal oxide, a metal nitride, a siliconoxide, and a silicon nitride.
 15. The organic light emitting displayapparatus according to claim 14, wherein the inorganic blocking layer isformed with an atomic layer deposition method, a plasma enhancedchemical vapor deposition method, or a physical vapor deposition method.16. The organic light emitting display apparatus according to claim 4,wherein the hydrophobic organic layer has a thickness larger than thatof the inorganic blocking layer.
 17. The organic light emitting displayapparatus according to claim 4, wherein the hydrophobic organic layerand the inorganic blocking layer are formed by a same deposition method.18. The organic light emitting display apparatus according to claim 1,wherein the hydrophobic organic layer comprising hydrophobic organicmaterial having C—F bond, Si—C bond, Si—O—Si bonds and C—H bond.